649167913 has 2 divisors, whose sum is σ = 649167914. Its totient is φ = 649167912.

The previous prime is 649167877. The next prime is 649167919. The reversal of 649167913 is 319761946.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 453391849 + 195776064 = 21293^2 + 13992^2 .

It is a cyclic number.

It is not a de Polignac number, because 649167913 - 2⁹ = 649167401 is a prime.

It is not a weakly prime, because it can be changed into another prime (649167919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324583956 + 324583957.

It is an arithmetic number, because the mean of its divisors is an integer number (324583957).

Almost surely, 2^649167913 is an apocalyptic number.

It is an amenable number.

649167913 is a deficient number, since it is larger than the sum of its proper divisors (1).

649167913 is an equidigital number, since it uses as much as digits as its factorization.

649167913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 649167913 is about 25478.7737734766. The cubic root of 649167913 is about 865.8693135024.

The spelling of 649167913 in words is "six hundred forty-nine million, one hundred sixty-seven thousand, nine hundred thirteen".